Case Report: Four patients (average age 51.5±33) who underwent surgery before 3-487 months (ave.135 months) and presented to our clinic between March 2003 and November 2004 with decreased visual acuity (VA), hyperemia and pain for 1-3 (ave. 1.75) days, were diagnosed as endophthalmitis. Although the patients presented to our clinic immediately after the symptoms appeared, the VA’s were light perception (LP) in 3 cases and hand-motion (HM) in 1 case. All cases underwent pars plana vitrectomy (PPV) and intravitreal antibiotic injection. Streptococcus pneumoniae in 2 cases and Streptococcus pyogenes in 2 cases were detected in specimens which were obtained from the vitreous. Best corrected visual acuity (BCVA) after an average 2 month (1-4 month) follow-up were no-LP in 1 case, LP in 1 case, and HM in 2 cases. Mean intraocular pressure (IOP) was 10±3.6 mm Hg. Even though B-Scan ultrasonography of the 4 eyes demonstrated membrane-like echoes in the vitreous cavity with an attached retina at presentation to the clinic, 2 (50%) of the patients had total retinal detachment and the other one had an optic atrophy at their last follow-up.

Conclusion: Streptococcus species, which is a frequently isolated agent after trabeculectomy, causes late-onset endophthalmitis, which has a poor VA prognosis and retinal condition. Keywords : Endophthalmitis, pars plana vitrectomy, Streptococcus, trabeculectomy